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Hash : 5a455acd
Author :
Date : 2018-10-17T23:21:17
Fix hangs due to watermarks overruns in bufferevents implementations Some implementations of bufferevents (for example openssl) can overrun read high watermark. And after this if user callback will not drain enough data it will be suspended (i.e. it will not be runned again anymore). This is not the expecting behaviour as one may guess, since in this case the data will never be read. Hence once we detected that the watermark exceeded (even after calling user callback) we will schedule the callback again. This also can be fixed in bufferevent openssl implementation (by strictly limiting how much data is added to the read buffer according to read high watermark), but since this data is already available (and in memory) there is no point in doing so.
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